ILTIMING_MESSAGE (Compact 2013)
3/28/2014
This structure is used by ILTiming.exe when it calls the KernelIoControl function with IOCTL_HAL_ILTIMING.
Syntax
typedef struct tILTIMING_MESSAGE {
WORD wMsg;
WORD wNumInterrupts;
DWORD dwIsrTime1;
DWORD dwIsrTime2;
DWORD dwSPC;
DWORD dwFrequency;
PVOID pfnPerfCountSinceTick;
} ILTIMING_MESSAGE, *PILTIMING_MESSAGE;
Members
wMsg
Command to process. The OAL fills in the structure depending on the value of wMsg.The following four messages are defined for wMsg:
Message
Description
ILTIMING_MSG_ENABLE
The OAL hooks the system tick from causing a SYSINTR_TIMING interrupt event.
No structure fields are updated.
ILTIMING_MSG_DISABLE
The OAL unhooks the system tick from causing a SYSINTR_TIMING interrupt event.
No structure fields are updated.
ILTIMING_MSG_GET_TIMES
The OAL fills in all structure members except pfnPerfCountSinceTick.
ILTIMING_MSG_GET_PFN
The OAL returns a pointer to the PerfCountSinceTick function in pfnPerfCountSinceTick that are called in kernel mode from the application to minimize overhead.
- wNumInterrupts
Number of interrupts since the last call.
- dwIsrTime1
Start of ISR.
- dwIsrTime2
End of ISR.
- dwSPC
Saved program counter at time of INT.
- dwFrequency
PerfCount frequency.
- pfnPerfCountSinceTick
Pointer to OAL function.
Remarks
The OAL will fill in the structure depending on the value of wMsg.
For an example of the OAL implementation, see the sample platforms in %_WINCEROOT%\Platform.
Requirements
Header |
iltiming.h |
See Also
Reference
Kernel Structures
ILTiming.exe Real-Time Measurement Tool